Sunday, November 29, 2009

Mammoth Hot Springs at the Yellowstone National Park


Travertine Terraces are seen at Mammoth Hot Springs in the northwest corner of Yellowstone National Park, Wyoming. Travertine is a form of calcium carbonate that is dissolved from limestone beneath the ground, and is then carried to the surface by hot water. The colours represent a variety of bacterial algae that survive at various temperatures. Card was sent to me by Stephanie.

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